US2293537A - Method of producing tempered glass sheets - Google Patents

Method of producing tempered glass sheets Download PDF

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Publication number
US2293537A
US2293537A US238158A US23815838A US2293537A US 2293537 A US2293537 A US 2293537A US 238158 A US238158 A US 238158A US 23815838 A US23815838 A US 23815838A US 2293537 A US2293537 A US 2293537A
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United States
Prior art keywords
sheet
glass
rollers
grooves
sheets
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Expired - Lifetime
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US238158A
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English (en)
Inventor
Ferlito Edoardo
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Individual
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Individual
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Publication of US2293537A publication Critical patent/US2293537A/en
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B27/00—Tempering or quenching glass products
    • C03B27/04—Tempering or quenching glass products using gas
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B15/00—Drawing glass upwardly from the melt
    • C03B15/02—Drawing glass sheets
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B27/00—Tempering or quenching glass products
    • C03B27/04—Tempering or quenching glass products using gas
    • C03B27/052—Tempering or quenching glass products using gas for flat or bent glass sheets being in a vertical position
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B19/00—Cameras
    • G03B19/02—Still-picture cameras
    • G03B19/10—Plate or cut-film cameras

Definitions

  • the invention contemplates the formation of grooves upon one or both sides of one and the same sheet during the tempering process. These grooves have minimum tensions (due to the limited thickness of same) or have at least different tensions from the'rest of the sheet. In this manner the sheets may be cut, after tempering, into several pieces, out of the large tempered sheet, along the aforesaid grooves which serve as cutting or detachment lines.
  • the present invention is applicable to horizontal as well as to vertical sheet glass producing machines.
  • These machines are characterized by a plurality of rollers having special pro- Jections or recesses, or blades or punch-dies shaped to conform exactly to the pattern, which must be etched on the heated sheet as soon as same has left the tank and during the formation
  • These methods make thereof, which patterns correspond to the size and shape of the finished glass sheets and therefore constitute cutting lines.
  • the apparatus for the rolling out of the glass both horizontally and vertically is provided with stamping means that follow said sheet in itsascending or horizontal course at a speed corresponding to that of the glass strip and suitably accelerated relatively to the work actually in hand.
  • means are provided for the sudden cooling by jets of air or other fluid, or
  • These cooling means such as caissons, perforated pipes, nozzles and so forth, may be fixed or movable, according to the thickness of the sheet and to the speed of travel of the glass strip, and.
  • the sheets may blow air uninterruptedly or at intervals. They may also be arranged so as to cool both sides of the sheet.
  • the large strip-shaped sheet emerging from the tank will be' impressed by rollers, blades, wheels or dies, situated at a proper height relatively to the tank.
  • rollers, etc. are constructed to produce a series of preordinate grooves, simple or crossed or of any description, on said glass sheet,,which grooves will form the lines ,for subsequent separation. After that, tempering will take place.
  • grooves or indentations may also be made in sheets by casting or similar methods.
  • Fig. 6 shows saidcylinder in a front elevation
  • Fig. 7 is a schematic side view of a device to be applied to a furnace of the Libbey Owens type in which cutting grooves are produced upon a horizontal sheet;
  • Fig. 8 is a schematic side view of a modiflcation
  • iFig. 9 is a front view of the device shown in F s- Fig. 10 is an end view of a modified form of the invention involving the use of a casting grate for providing grooves in the molten glass sheet prior to tempering, the glass being shown in position in the mold.
  • the sheet of glass c rises from the tank a of a conventional furnace through a special (floataccept? the strip above the first rollers ef may also be omitted.
  • This sheet is of a pasty consistency and has a width and length corresponding to the passage through the said float b.
  • the glass strip is guided by two rollers dd.
  • the sheet is gripped by two other large rollers -1 of which that marked c in the example is a press roller such as that indicated in Figs. 3 and 4; that marked 1 instead, being a roller provided with raised portions as indicated in Figs. 5 and 6.
  • the roller 1, as illustrated, includes linear raised portions for producing quadrangular sheets, but it will be plain that the said raised portions may be of any other shape. It is advisable to heat these raised portions or points for the purpose of permittingv the formation of the grooves as required.
  • Two guide rollers dd follow the rollers e, 'f and then the ascending sheet proceeds between two special large air-blowing rollers o-o.
  • These rollers are provided therefor with a certain number of nozzles, slots or passages g through which is violently blowrr the cold air introduced into said rollers by means of ventilators (not shown in the drawings).
  • These nozzles or passages are provided with 'regulat-s able closing means, so as not to blow any unnecessary air, and especially, not to blow any against the lower part of the sheet during the grooving process, viz.
  • blow-rollers g-g not to blow it against points at whichthe glass is to remain heated more blow-rollers g-g and lastly, two large airaspirating rollers h--h, having the same power as those marked 9, but which, instead of blowing, aspirate the heat remaining on the sheet 0.
  • Figs. 1 and 2 show rollers f-f only as carrying raised portions to fit the grooves in the sheet, it will be understood that the rollers e and e may be similar to those marked f--f that is, they may also be provided with raised portions. In the latter case'however, the raised portions of the said cylinders or rollers must with one another coincide and the two cylinders must rotate at the same speed, so that corresponding indentations are produced on the ascending glass strip on both sides in registering relationship.
  • the means for rotating the blowing cylinders is arranged so that the speed of rotation of successive cylinders will increase progressively with respect to their order of engagement with the glass sheet.
  • the guide-rollers d disposed along cycle is completed and provided with various lines or indentations, within which indentations or grooves the tensions are at a minimum relatively to the tensions in the rest of the sheet, in any event the tension in the grooves is less than in the rest of the sheet.
  • the said tempered glass sheet may, after completion of the tempering operation, be divided into a numher of sheets or portions, determined by the grooves produced upon the aforesaid glass sheet.
  • the severing may be accomplished by any wellknown means and the severed edges may be polished in the usual manner.
  • the horizontally moving strip is grooved with cutting points or the like, spaced a certain distance apart, to enable the separation of the several sheets delineated.
  • Fig. 8 may be applied to furnaces producing vertical glass strips.
  • the apparatus may beactuated by compressed air, or by a hydraulic system, or by any other suitable actuating force.
  • the lower conduits p-p are controlled in syn same may be said as regards the upper conduits 1-1 which are also controlled in synchronism with the cutting off of water or air from the cylinders -0.
  • the dies t--t connected to the pistons 0 carry, on the face bearing against the glass strip,
  • the die t carries horizontal lines in relief, while the die t carries vertical linesin relief. In this manner the strip is grooved on both sides for quadrangular sheets.
  • the admission of air or water is then cut off from the conduits s-s, the conduits rr being opened at the same time, whence the' air or the water contained in the cylinders 0-0 is evacuated.
  • the return movement of the dies sheets of tempered glass from molten glass comprising, continuously forming molten glass into a sheet of substantially uniform thickness, forming while the sheet is still in a soft condition intersecting grooves in'succeeding portions of said sheet, at least one of the grooves being continuous and extending thereacross substantiallyfrom edge to edge thereof, continuously.
  • selected movement may be imparted to the air streams emanating from the caissons u-u so as to, prevent theoccurrence .of irridescence.
  • the invention may also be carried out by placing the vitreouscastdisengaged from the dies, passes between the two after chilling. 1
  • a continuous process for the production of sheets of tempered glass from molten glass corn prising, continuously forming molten glass into v a sheet of substantially uniform thickness, forming while the sheet is still in a soft condition intersecting grooves in succeeding portions of one face of said sheet, at least one of the grooves being continuous and extending thereacross substantially from edge to edge thereof, simultaneously forming registering grooves on the opposite face of the sheet, continuously subjecting successive portions of said sheet to a cooling blast immediately after the formation of said grooves, and severing the sheet along the grooves after chilling.
  • a process for the production of sheets of tempered glass from molten glass comprising, forming molten glass into a sheet of substantially uniform thickness, having at least'one continu-' ous groove therein extending 'thereacross substantially from edgeto edge, subjecting all portions of said grooved sheet to a cooling blast immediately after the formation thereof, and severihg the sheet along the groove after chilling.
  • a continuous process for the productionv of sheets of tempered glass from molten glass comprising, continuously forming molten glass into a sheet of substantially uniform thickness, forming while the-sheet is still in a soft condition at ing '2 on a mold a: embodying the desired design.
  • the registering intersecting. lines in the sheet may beapplied to the castingby a roller 11 em bodying a design 0 similar to that of the mold.
  • a sheets of least one continuous groove therein extending thereacross substantially from edge to edge, continuously subjecting successive portions of said sheet to a partial tempering, reforming said groove subsequent to the partial tempering, completing the tempering and thereafter severing the sheet along the groove after chilling.

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Joining Of Glass To Other Materials (AREA)
US238158A 1937-09-25 1938-11-01 Method of producing tempered glass sheets Expired - Lifetime US2293537A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT207059X 1937-09-25
IT241237X 1937-12-24

Publications (1)

Publication Number Publication Date
US2293537A true US2293537A (en) 1942-08-18

Family

ID=26327625

Family Applications (1)

Application Number Title Priority Date Filing Date
US238158A Expired - Lifetime US2293537A (en) 1937-09-25 1938-11-01 Method of producing tempered glass sheets

Country Status (7)

Country Link
US (1) US2293537A (zh)
BE (1) BE430319A (zh)
CH (1) CH207059A (zh)
DE (1) DE734853C (zh)
FR (1) FR843804A (zh)
GB (1) GB503649A (zh)
NL (1) NL89874C (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3150950A (en) * 1960-10-03 1964-09-29 Pittsburgh Plate Glass Co Working glass
US3162520A (en) * 1959-05-18 1964-12-22 Pittsburgh Plate Glass Co Treating glass sheets
US20110239708A1 (en) * 2008-12-19 2011-10-06 Noritomo Nishiura Apparatus for manufacturing glass sheet
CN106542729A (zh) * 2016-12-26 2017-03-29 重庆天和玻璃有限公司 玻璃生产辅助装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1001460B (de) * 1952-10-16 1957-01-24 Compagnies Reunies Des Glaces Verfahren und Vorrichtung zur raschen Abkuehlung von Glas

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162520A (en) * 1959-05-18 1964-12-22 Pittsburgh Plate Glass Co Treating glass sheets
US3150950A (en) * 1960-10-03 1964-09-29 Pittsburgh Plate Glass Co Working glass
US20110239708A1 (en) * 2008-12-19 2011-10-06 Noritomo Nishiura Apparatus for manufacturing glass sheet
CN106542729A (zh) * 2016-12-26 2017-03-29 重庆天和玻璃有限公司 玻璃生产辅助装置

Also Published As

Publication number Publication date
GB503649A (en) 1939-04-12
CH207059A (de) 1939-09-30
NL89874C (zh)
BE430319A (zh)
FR843804A (fr) 1939-07-11
DE734853C (de) 1943-04-27

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